Fu C-M, Fu H-L. SOME RESULTS ON DISJOINT STEINER QUADRUPLE SYSTEMS. Tamkang J. Math. [Internet]. 1990 Dec. 1 [cited 2024 Nov. 21];21(4):345-9. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4681